Strange LINQ to SQL Behavior

Posted by mcass20 on Stack Overflow See other posts from Stack Overflow or by mcass20
Published on 2010-06-09T13:29:54Z Indexed on 2010/06/09 13:32 UTC
Read the original article Hit count: 257

Filed under:

c#

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linq-to-sql

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lambda-expressions

What is wrong with the last query? Is it a bug or am I missing something?

This query returns 2 records (correct):

query = query.Where(Log => SqlMethods.Like(Log.FormattedMessage, "%<key>Name</key><value>David</value>%"));

This query returns 2 records (correct):

query = query.Where(Log => SqlMethods.Like(Log.FormattedMessage, "%<key>Name</key><value>%David%</value>%"));

This query returns 0 records (correct):

query = query.Where(Log => SqlMethods.Like(Log.FormattedMessage, "%<key>Name</key><value>av</value>%"));

This query returns 2 records (correct):

query = query.Where(Log => SqlMethods.Like(Log.FormattedMessage, "%<key>Name</key><value>%av%</value>%"));

This query returns 0 records (correct):

query = query.Where(Log => SqlMethods.Like(Log.FormattedMessage, "%<key>Name</key><value>v</value>%"));

This query returns 15 records (incorrect, should return 2):

query = query.Where(Log => SqlMethods.Like(Log.FormattedMessage, "%<key>Name</key><value>%v%</value>%"));

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